21.09
mon
mon
Day
63°F
W 6 mph
Precip.
22%
22%
Night
48°F
SW 7 mph
Precip.
12%
12%
22.09
tue
tue
Day
59°F
W 5 mph
Precip.
2%
2%
Night
45°F
SW 4 mph
Precip.
10%
10%
23.09
wed
wed
Day
57°F
NW 5 mph
Precip.
3%
3%
Night
46°F
SW 4 mph
Precip.
25%
25%
24.09
thu
thu
Day
61°F
N 4 mph
Precip.
3%
3%
Night
50°F
SW 5 mph
Precip.
27%
27%
25.09
fri
fri
Day
55°F
W 2 mph
Precip.
40%
40%
Night
46°F
SW 5 mph
Precip.
15%
15%
26.09
sat
sat
Day
59°F
W 5 mph
Precip.
12%
12%
Night
48°F
SW 5 mph
Precip.
9%
9%
27.09
sun
sun
Day
63°F
NW 4 mph
Precip.
4%
4%
Night
52°F
SW 5 mph
Precip.
13%
13%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 76.7°F. The highest and lowest sea temperatures during the month were 79.7°F and 73.8°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 65.6°F. The highest and lowest sea temperatures during the month were 71.4°F and 62.2°F.
Air temperature in Cerkno, °F
Precipitation total in Cerkno, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Cerkno
Cerkno on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Cerkno
Local time: 13:54
September 21, monday
1500
64°F
W
6 mph
6 mph
1800
59°F
W
5 mph
5 mph
2100
52°F
SW
6 mph
6 mph
September 22, tuesday
0000
48°F
SW
7 mph
7 mph
0300
46°F
SW
7 mph
7 mph
0600
43°F
SW
7 mph
7 mph
0900
50°F
SW
6 mph
6 mph
1200
59°F
W
5 mph
5 mph
